Briquet.



a the production of oil gas.

UNITED STATES PATENT oFFIcE. I

JULIUS ALEXANDER, OF ALTONA, GERMANY.-

Patented Nov. 10, 1914.

'BRIQUET.

1,117,125, Specification of Letters Patent.

No Drawing.

To all whom it may concern Be it known that I, JULIUs ALEXANDER, a subject of the German Emperor, and a resident of 11 Ottensener Marktplatz, Altona, Germany, have invented certain new and useful Improvements in Briquets, of which the following is a statement. 7

In the working of railways combustible waste products are obtained in form of coke dust (cinders from the smoke box of the engines), saw dust and wood shavings, and other combustible waste products such as oil gas tar and lamp black are obtained in Of these waste products sawdust and coke dust have been employed in the production of briquets, but these materials could not be used with the customary methods employing pitch or coal tar or other viscous tars resulting in the dry distillation of solid raw materials as binding medium, as, even under high' pressure, the pitch or tar will bind the particles of coke or saw dust together on the1r surface only, whereas the air, contained in the numerous pores is firmly inclosed in the compression and cannot escape. The result of this is that such briquets, when they are fired on the grate, quickly fall to pieces, as experience has shown, as the air contained in the pores expands already at the commencement of the combustion and thereby cause the briquets to fall to pieces even before any intensive combustion could take place. Thereby the whole object of briqueting the coke or sawdust which in the non-briqueted condition can only be burnt on special grates with under-grate blast entailing high working expenses is nullified. Even crude petroleum which has been also suggested as a binding medium, cannot fulfil its purpose, because its binding power is ex- 7 tremely small and necessitates considerable pressure for the compression which essen-- tially increases the cost of production of the briquets.

According to the present invention a binding medium is used for briqueting coke dust and the like which binding medium, serving as substitute for the aforementioned pitch Application filed December 3, 1913.

Serial No. 804,406.

tained in the manufacture of oil gas, which,

as has been shown by experiments, is capable of entering. into the pores of the coke and driving out the air therein contained already at a pressure of 100 atmospheres. At the same time this tar constitutes a much better binding medium as compared with the coal tar hitherto used as such, because in the normal conversion of gas oils into gas about 30% of the same pass over partly unchanged and partly in form of liquid and thick hydrocarbons into the precipitated oil gas tar and considerably increase, as compared to coal tar, the binding efficiency of the same and its calorific value (about 10600 heat units). gas tar as a binding medium are still further increased according to the present invention by the fat or oil soot depositing in the retorts and pipes being added to it.

According to the present invention, thus, a high-value briquet is produced of a calorific value of about 6900 heat units, which, as careful tests have shown, can already be produced at a pressure of 100 atmospheres, and which, when burnt on an ordinary grate will retain its coherence like ordinary mineral coal.

The components mentioned hereinbefore are preferably mixed at the following ratio: 9 parts of wood waste; 85 parts of coke These advantages of the oil cinders or coke dust; 6 parts of oil gas tar.

in place of the latter 6 parts of oil gas tar also equal parts of oil gas tar and oil soot may be used thus giving the following formula: 9 parts of wood waste; parts of coke cinders or coke dust; 3 parts of oil gas tar; 3 parts of oil soot. This mixture is then pressed under an ordinary briqueting rial comprising oil gas tar, and oil soot, the aflixed my signature in the presence of two several ingredients being mixed together in subscribing Witnesses.

about the proportions specified and oomr pressed into briquets, the finished briquets JULIUS ALEXANDER 5 retaining the volatile matter of the binding Witnesses:

material ERNEST H. L. MUMlmmrlorr,v

In testlmony whereof I have hereunto IDA CHRIsT. HAFERMANN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

